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I have noticed that My 2007 IS 250 SE has a device called a "Windshield Wiper De-Icer" which is described on page 194 of my owner's manual. The description of what this actually does is not very clear (at least to me.) Will using this clear ice off the entire windshield or just free up the wiper arms if they become inoperative due to freezing solid?

Again apologies for my ignorance and any info will be gratefully received.

Perhaps it is just me but I find modern vehicles very complex and full of items that seem unnecessarily so . I appreciate we live in the gadget age but I have never been fascinated by such things.

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Thank you very much and I expected this to be the case. Many years ago I drove an Escort which had a heated windscreen and I thought it was marvellous. I have often wondered why I have never seen such a useful feature on other cars.

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i believe the Ford patent for the heated front screen expired last year, not sure if this is something Ford could renew or even if they have done, so it will be interesting to see what the other manufactures now do